Phidgets TSL4212_0 T-nut PG40 M6
The T-nuts provide an option for an attachment point that can be installed in the center of an extrusion without having to push the nut all the way in from the end. This allows for faster installation as well as installation after the structure is fully constructed, but it requires a little finesse to install properly. For more information on installation, refer to the T-Nut Primer in the Specifications section. These nuts are suitable for use with M6 bolts.
Manufacturer Datasheet Phidgets TSL4212_0 (2.21.10.M6)